View output from multiple laptops on one monitor at the same time

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http://superuser.com – I have two (or multiple) laptops and a single monitor. I could use a KVM switch to switch between laptops. I have a follow up question. Is there anyway i could view screens of multiple laptops on one monitor 'at the same time'. I want to watch video/music on one of the laptops while i work on the other all at the same time (on the same monitor). Is this (or something similar) possible? (HowTos)